Original Creation Date: 08/01/95
Last Update Date: 05/19/98
Last Major Revision Date: 01/21/97
MJLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS
General Description
The LP2951 is a micropower voltage regulator with very low quiescent curent (75 uA typ.)
and very low dropout voltage (typ. 40 mV at light loads and 380 mV at 100mA). They are
ideally suited for use in battery-powered systems. Furthermore, the quiescent current of
the LP2951 increases only slightly in dropout, prolonging battery life.
The 8-Lead LP2951 is available in plastic, ceramic dual-in-line, or metal can packages and
offers additional system functions.
One such feature is an error flag output which warns of a low output voltage, often due to
falling batteries on the input. It may be used for a power-on reset. A second feature is
the logic-compatible shutdown input which enables the regulator to be switched on and off.
Also, the part may be pin-strapped for a 5V output or programmed from 1.24V to 29V with an
external pair of resistors.
Careful design of the LP2951 has minimized all contributions to the error budget. This
includes a tight initial tolerance (.5% typ.), extremely good load and line regulation
(.05% typ.) and a very low output voltage temperature coefficient, making the part useful
as a low-power voltage reference.
NS Part Numbers
JL2951BGA*
JL2951BPA**
JL2951S2A***
JL2951SGA****
JL2951SPA*****
Industry Part Number
LP2951
Prime Die
LP2951
Controlling Document
See Features Page REV C
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description Temp ( C)
o
1 Static tests at +25
2 Static tests at +125
3 Static tests at -55
4 Dynamic tests at +25
5 Dynamic tests at +125
6 Dynamic tests at -55
7 Functional tests at +25
8A Functional tests at +125
8B Functional tests at -55
9 Switching tests at +25
10 Switching tests at +125
11 Switching tests at -55
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MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
Features
- SMD : 5962-3870501BGA*, BPA**, S2A***, SGA****, SPA*****.
2
MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
(Absolute Maximum Ratings)
(Note 1)
Power Dissipation
(Note 2) 675mW at +25 CMETAL CAN 1.0W at +25 CCERDIP 1.25W at +25 CLCC 1.0W at +25 CCERAMIC SOIC
Lead Temperature 260 C(Soldering, 10 seconds)
Storage Temperature Range -65 C to +150 C
Operating Junction Temp Range -55 C to +160 CLP2951
Input Supply Voltage -0.3 to +30V
Feedback Input Voltage
(Note 3, 4) -1.5 to +30V
Shutdown Input Voltage
(Note 3) -0.3 to +30V
Error Comparator Out. Voltage
(Note 3) -0.3 to +30V
Thermal Resistance
ThetaJA 163 C/W METAL CAN (Still Air @ 0.5W) 95 C/W (500LF/Min Air flow @ 0.5W) 131 C/W CERDIP (Still Air @ 0.5W) 75 C/W (500LF/Min Air flow @ 0.5W) 95 C/W LCC (Still Air @ 0.5W) 66 C/W (500LF/Min Air flow @ 0.5W) 215 C/W CERAMIC SOIC (Still Air @ 0.5W) 130 C/W (500LF/Min Air flow @ 0.5W)
ThetaJC 51 C/W METAL CAN 21 C/W CERDIP 24 C/W LCC 24 C/W CERAMIC SOIC
Package Weight TBD(Typical)
ESD Rating 500V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Operating Ratings indicate conditions for which the device is functional, but do not
guarantee specific performance limits. For guaranteed specifications and test
conditions, see the Electrical Characteristics. The guaranteed specifications apply
only for the test conditions listed. Some performance characteristics may degrade
when the device is not operated under the listed test conditions.
Note 2: The maximum power dissipation msut be derated at elevated temperatures and is
dictated by Tjmax (maximum junction temperature), ThetaJA (package junction to
ambient thermal resistance), and TA (ambient temperature). The maximum allowable
power dissipation at any temperature is Pdmax = (Tjmax - TA)/ThetaJA or the number
given in the Absolute Maximum Ratings, whichever is lower.
Note 3: May exceed input supply voltage.
Note 4: When used in dual-supply systems where the output terminal sees loads returned to a
negative supply, the output voltage should be diode-clamped to ground.
3
MJLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vout = 5V (Nominal), Cload = 3.3uF, Vsd = 0.6V, Vin = 6V, Il = -100uA
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Vo Output Voltage Vin = 6V, Il = -100uA 4.975 5.025 V 1
4.94 5.06 V 2, 3
Voline Line Regulation 6V < Vin < 30V, Il = -1mA -5 5 mV 1
6V < Vin < 30V, Il = -1mA -25 25 mV 2, 3
Voload Load Regulation -100uA < Il < -100mA, Vin = 6V -5 5 mV 1
-100uA < Il < -100mA, Vin = 6V -25 25 mV 2, 3
Vd Dropout Voltage Il = -100mA 450 mV 1
600 mV 2, 3
Il = -100uA 80 mV 1
150 mV 2, 3
Ig Ground Current Il = -100mA, Vin = 6V 12 mA 1
14 mA 2, 3
Il = -100uA, Vin = 6V 120 uA 1
140 uA 2, 3
Il = -100uA, Vout = 15V, Vin = 30V 120 uA 1
140 uA 2, 3
Il = -100uA, Vin = 30V, Vout = 15V 15 mA 1
20 mA 2, 3
Igdiff Ground Current
Change 6V < Vin < 30V, Il = -100uA -30 30 uA 1
6V < Vin < 30V, Il = -100uA -50 50 uA 2, 3
Igdo Dropout Ground
Current Vin = 4.5V, Il = -100uA 170 uA 1
200 uA 2, 3
Vlt Error Comparator
Lower Threshold
Voltage
Vin = 6V, Il = -100uA 1 0 0.8 mV 1, 2,
3
Vut Error Comparator
Upper Threshold
Voltage
Vin = 6V, Il = -100uA 1 2 30 mV 1, 2,
3
Vrth Thermal
Regulation Vin = 30V, Il = -50mA, 2mS < T < 10mS -12.5 12.5 mV 1
Isc Current Limit Vout = 0V, Vin = 6V 200 mA 1
220 mA 2, 3
4
MJLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS(Continued)
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vout = 5V (Nominal), Cload = 3.3uF, Vsd = 0.6V, Vin = 6V, Il = -100uA
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Igsc Ground Current At
Current Limit Vout = 0V, Vin = 6V 20 mA 1
25 mA 2, 3
Vref Reference Voltage 1.22 1.25 V 1
1.20 1.26 V 2, 3
Vrline Reference Voltage
Line Regulation 2.3V < Vin < 30V -1.9 1.9 mV 1
2.3V < Vin < 30V -10 10 mV 2, 3
Vrload Reference Voltage
Output Regulation 1.2V < Vout < 29V, Vin = 30V -1.2 1.2 mV 1
1.2V < Vout < 29V, Vin = 30V -5 5 mV 2, 3
Ifb Feedback Pin Bias
Current 40 nA 1
60 nA 2, 3
Ioh Error Comparator
Output Leakage
Current
Vo = 30V 1uA1
2 uA 2, 3
Vol Error Comparator
Output Low
Voltage
Vin = 4.5V, Vsd = 2V 250 mV 1
400 mV 2, 3
Isd Shutdown Pin
Input Current Vsd = 2.4V 50 uA 1
100 uA 2, 3
Vsd = 30V 600 uA 1
750 uA 2, 3
Vsdl Shutdown Input
Logic Voltage (LOW) 1 0.6 V 1, 2,
3
Vsdh Shutdown Input
Logic Voltage (HIGH) 1 2 V 1, 2,
3
Ilkg Regular Output
Bias Current In
Shutdown
Vsd = 2V, Vin = 30V, Il = 0mA -10 10 uA 1
-20 20 uA 2, 3
AC PARAMETERS
(The following conditions apply to all the following parameters, unless otherwise specified.)
AC: Vin = 6V, Cload = 3.3uF, Vsd = 0.6V
Rr Ripple Rejection f = 120Hz, Vin = 0.1Vrms 50 dB 4
Vnoise Output Noise C1 = 1uF 600 uVrms 7
C1 = 3.3uF 250 uVrms 7
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MJLP2951-X REV 1B1 MICROCIRCUIT DATA SHEET
Electrical Characteristics
DC PARAMETERS: DRIFT VALUES
(The following conditions apply to all the following parameters, unless otherwise specified.)
DC: Vout = 5V (Nominal), Cload = 3.3uF, Vsd = 0.6V, Vin = 6V, Il = -100uA. "Delta calculations performed
on JAN S and QMLV devices at group B, subgroup 5 ONLY."
SYMBOL PARAMETER CONDITIONS NOTES PIN-
NAME MIN MAX UNIT SUB-
GROUPS
Ig Ground Current Il = -100uA, Vin = 6V -6.5 6.5 uA 1
Vref Reference Voltage -0.005
50.0055 V 1
Note 1: Parameter tested go-no-go only.
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MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
Graphics and Diagrams
GRAPHICS# DESCRIPTION
05810HRA2 METAL CAN (H), TO-99, 8LD, .200 DIA P.C. (B/I CKT)
06059HRA2 CERDIP (J), 8 LEAD (B/I CKT)
06146HRA2 LCC (E), TYPE C, 20 TERMINAL(B/I CKT)
06341HRA1 CERPACK (W), 10 LEAD (B/I CKT)
E20ARE LCC (E), TYPE C, 20 TERMINAL(P/P DWG)
H08CRF METAL CAN (H), TO-99, 8LD, .200 DIA P.C. (P/P DWG)
J08ARL CERDIP (J), 8 LEAD (P/P DWG)
P000205A METAL CAN (H), 8 LEAD (PINOUT)
P000206A CERDIP (J), 8 LEAD (PINOUT)
P000251B LCC (E), 20 LEAD (PINOUT)
P000374A CERAMIC SOIC (WG), 10 LEAD (PINOUT)
WG10ARC CERAMIC SOIC (WG), 10 LEAD (P/P DWG)
See attached graphics following this page.
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N
N
N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
4 18
5
6
7
8 14
9 10 11 12 13
17
16
15
3 2 1 20 19
N/C
SHUTDOWN
N/C
OUTPUT N/C INPUT N/C
FEEDBACK
N/C
5V TAP
N/C
ERROR
GND
N/C
SENSE
LP2951E
20 - LEAD LCC
CONNECTION DIAGRAM
TOP VIEW
P000251B
N/C
N/C N/C
N/C
N/C
N
MIL/AEROSPACE OPERATIONS
2900 SEMICONDUCTOR DRIVE
SANTA CLARA, CA 95050
1 10
2 9
3 8
4 7
5 6
OUTPUT
SENSE
SHUTDOWN
GND
N/C N/C
ERROR
VTAP
FEEDBACK
10 - LEAD CERAMIC SOIC
TOP VIEW
CONNECTION DIAGRAM
P000374A
INPUT
LP2951WG
MICROCIRCUIT DATA SHEET
MJLP2951-X REV 1B1
Revision History
Rev ECN # Rel Date Originator Changes
1B1 M0002867 05/19/98 Barbara Lopez Update MDS: MJLP2951-X Rev. 1A0 to MJLP2951-X Rev.
1B1. Updated SMD number to add suffixes. Updated NSID
to add astericks associated with SMD suffix. Updated
power dissipation, lead temperature, junction
temperature, thermal resistance and ESD rating.
Changed note 1 to Absolute note, updated note 2 to
power dissipation note. Added graphics for all
packages. Added Package Weights.
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